diff --git a/src/pocketmine/world/SimpleChunkManager.php b/src/pocketmine/world/SimpleChunkManager.php
index 35cab0f03..dd7bce34f 100644
--- a/src/pocketmine/world/SimpleChunkManager.php
+++ b/src/pocketmine/world/SimpleChunkManager.php
@@ -61,6 +61,7 @@ class SimpleChunkManager implements ChunkManager{
 	public function setBlockAt(int $x, int $y, int $z, Block $block) : bool{
 		if($this->terrainPointer->moveTo($x, $y, $z, true)){
 			$this->terrainPointer->currentSubChunk->setFullBlock($x & 0xf, $y & 0xf, $z & 0xf, $block->getFullId());
+			$this->terrainPointer->currentChunk->setChanged(true);
 			return true;
 		}
 		return false;